My cat is 15 years old and just underwent surgery to remove absessed teeth. Before we put her in surgery, I noticed that her eye was watering. The vet gave her some eye antibiotics and said that it should clear it up. After finishing the medication, her eye didn't clear it, instead it seemed to get worse. Her left eye looks very infected and has a cloudy coating over it and still waters. I was wondering what this could be and if I should get her another anitibiotic shot of some sort. She is old and I don't want to put her through any unnecessary stress . Any advice would be great.